sbs2003 to sbs2011 migration issues

I have about 23 mailboxes to move, it ran for about 36 hours or so and got about 10 done and 13 failed.  I have retried one mailbox that failed and upped the "corrupted message" to 10.  It failed again with messages that seemed like it pointed to availability of the old mailbox store.  I restarted the old server and then started again.  Its at 26% for 1 user and been running for almost 2 hours, its 6gb total so its only doing about a gb/hour, anything I can do to speed things up?  All of the failed ones are much larger 6gb minimum, some around 10 and several between 14-18gb each.
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rhwimmersAsked:
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Alan HardistyCo-OwnerCommented:
There is very little you can do to speed this up - it takes as long as it takes and with larger mailboxes, that is about a Gb per hour per mailbox.

Ideally, if you Archive the mailboxes to a .PST file before migrating them, the migration is miles quicker and then you can import the Archived mail once the mailbox has moved over.

Alan
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rhwimmersAuthor Commented:
I am going to try to export to PST using exmerge then import and see if that is faster.  Looks like exmerge and export and import to new server in one step - is that what the wizard is using?  This small 22 person migration will take a week or two!  I did a migration a long while back and it was larger but I did it on a Sunday, it wasn't sbs but not sure why it was so much faster (definitely had better/newer hardware I guess).

Whats difference between migrationon sbs or just exmerge?  Also, does exmerge take it off the exchange mailstore or is it really just a "copy"?
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rhwimmersAuthor Commented:
So exmerge only does 2gb pst's which isnt going to work.  Tried to run the script found here
http://theessentialexchange.com/blogs/michael/archive/2009/10/16/exporting-mailboxes-larger-than-2-gb-on-an-exchange-server.aspx
but then get
error on line 39 which is
mbMailbox = WScript.Arguments(0)

The users that are still on the old server cannot access their email from the new OWA, something about no trusted security between the two.  Any ideas on how to fix this?
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rhwimmersAuthor Commented:
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